RELEASE NOTES 

		spatstat 1.10-0

	 	18 October 2006

	We thank Juha Heikkinen and Colin Beale for suggestions.
	This upgrade includes results of joint research with Jesper Moller.


OVERVIEW
	The unit of length can now be specified in a dataset.

	Improvement to diagnostic plots.

	Subset operators have changed, but are backward-compatible.

	Substantial changes to the package's internal code,
	mostly invisible to the user.
	
NEW FEATURE: units

	Spatial datasets now carry the name of the unit of length
	(e.g. feet, metres) used for recording the Cartesian coordinates.
	The unit name is printed or plotted where appropriate.

	This applies to the classes "ppp", "owin", "im" and "fv".
	
	The unit name can be inspected using the function 
			units(x) 
	and changed using 
			units(x) <- value
	where x is an object of one of these classes.
	See help(units).


NEW FUNCTIONS

	disc
		creates a circular window.

	runifdisc
		generates n random points in a disc.

	units
		Inspect or set the name of the unit of length
		in a spatial dataset.

IMPROVEMENTS/ENHANCEMENTS

	diagnose.ppm
	lurking
		The error bounds in these plots	are now computed
		using an exact asymptotic formula for the residual variance.
		The bounds are now `violin-shaped' instead of `funnel-shaped'.

	summary functions Kest, Gest, Fest etc
		These functions now handle units,
		so that plot(Kest(X)) will label the x-axis in the 
		appropriate units.
		
	data(ants)
	data(bei)
	data(betacells)
	data(chorley)
	data(copper)
	data(finpines)
	data(nztrees)
	data(spruces)
	data(swedishpines)
		These datasets now incorporate a physical unit of length
		e.g. metres.

	[.ppp
	[<-.ppp
	[.psp
		The subset operators for point patterns and line patterns
		no longer distinguish between the roles of their
		first and second arguments.
			Thus x[i] is equivalent to x[,i] 
			and x[i,j] is equivalent to (x[i])[j]
		Each argument i, j can now be either a subset index 
		(in the usual R sense) or a window. 
		The second argument is retained for backward compatibility
		only, and will eventually be removed.

	hist.im
		Improved display for logical-valued and factor-valued images.

	print.im
	summary.im
	print.owin
	summary.owin
	print.ppp
		Minor improvements to output.

	

`INVISIBLE' CHANGES

	Internal code
		A very large number of changes to the internal workings
		of spatstat has been made, in preparation for a substantial
		upgrade of the package later. None of these changes is
		visible to the user.

	data(residualspaper)
		Minor adjustments to the data format and plotting code
		to conform to the changes mentioned above.

	classes "ppp", "owin", "im"
		The internal format of these objects has changed slightly
		but the package is compatible with both old and new formats.

BUGS

	[1] density.ppp
		Crashed if the point pattern was empty. Fixed.

	[2] plot.splitppp
		Crashed with message
			"negative length vectors are not allowed"
		if the number of split components (number of types of points)
		was a prime number. Fixed.

	[3] update.ppm, fitted.ppm, predict.ppm, residuals.ppm,
	diagnose.ppm, qqplot.ppm
		Sometimes crashed with an obscure message that
		the ppm object was 'damaged'. 
		Fixed, we hope.